diff --git a/epdb/legacy_api.py b/epdb/legacy_api.py
index b340bd21..3600f549 100644
--- a/epdb/legacy_api.py
+++ b/epdb/legacy_api.py
@@ -1540,6 +1540,7 @@ class PathwayNode(Schema):
     name: str = Field(None, alias="name")
     proposed: List[Dict[str, str]] = Field([], alias="proposed_intermediate")
     smiles: str = Field(None, alias="default_node_label.smiles")
+    pseudo: bool = Field(False, alias="pseudo")
 
     @staticmethod
     def resolve_atom_count(obj: Node):
@@ -1967,6 +1968,11 @@ def add_pathway_edge(request, package_uuid, pathway_uuid, e: Form[CreateEdge]):
             description=e.edgeReason,
         )
 
+        if e.multistep and e.multistep.strip() == "true":
+            reaction = new_e.edge_label
+            reaction.multistep = True
+            reaction.save()
+
         # Update depths as sideeffect of above operation
         pw.update_depths()
 
diff --git a/utilities/legacy.py b/utilities/legacy.py
index 023f256f..3a5a9415 100644
--- a/utilities/legacy.py
+++ b/utilities/legacy.py
@@ -141,7 +141,7 @@ def get_parameter(request, paramname):
     res = request.POST.get(paramname)
     if res is not None and res.strip() != "":
         return res
-    return ValueError("Not all parameters are set!")
+    raise ValueError("Not all parameters are set!")
 
 
 def get_parameter_or_empty_string(request, paramname):